How to configure grpc with ssl?

I have used below configuration to configure grpc with ssl in haproxy.cfg.
Still not able to request grpc service with ssl. Client gives error “14 UNAVAILABLE: failed to connect to all addresses”. Using bloomRPC as client.

log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
stats timeout 30s
user haproxy
group haproxy

	# Default SSL material locations
	ca-base /etc/ssl/certs
	crt-base /etc/ssl/private

	# See:
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

	log	global
	mode	http
	option	httplog
	option	dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
	errorfile 400 /etc/haproxy/errors/400.http
	errorfile 403 /etc/haproxy/errors/403.http
	errorfile 408 /etc/haproxy/errors/408.http
	errorfile 500 /etc/haproxy/errors/500.http
	errorfile 502 /etc/haproxy/errors/502.http
	errorfile 503 /etc/haproxy/errors/503.http
	errorfile 504 /etc/haproxy/errors/504.http
	option http-use-htx

frontend http_front
	bind *:80
	bind *:443 ssl crt /home/cso/Downloads/latest_ang_certs/local_com.pem
	stats uri /haproxy?stats
	default_backend http_back

backend http_back
	balance roundrobin
	server search_be_service localhost:4048 check proto h2